Retaining-ring for dynamo-electric machines.



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"WI llllllll UMTED STATES PATENT EARLE R. KNIGHT, 0F NORW'OOD, OHIO, ASS

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ALLIS- RETAINING-RING FOR DYNAMO-ELEGTRIC IZZACHINES.

Application filed May 1, 1909.

T aZZ whom it may concern e it known that I, Ennnn R. KNIGHT, a citizenof the United States, residing at Norwoot, in the county of Hamilton andState of Ohio, have invented certain new and useful Improvements inRetaining-Rings for Dynamo-Electric Machines, of which the following isa full, clear, and exact specification.

My invention relates to dynamo-electric machines, and particularly tomeans for securely holding in position the laminae of the cores ofeither the rotor or stator.

The object of my invention is to provide simple, inexpensive andeffective means for retaining the laminae in position, and one that canbe easily applied to the machine or removed when it is desired to removethe laminae.

In carrying out my invention, I provide a split retaining ring which isseated in a groove in a support such as a shaft, spider or frame.

More specifically considered my invention consists of a core of adynamo-electric machine comprising laminae, the laminae being clamped ona support between plates, one of said plates being held in position byan abutment on said support and the other plate being held in positionby a split ring partially seated in a groove in the support.

My invention further consists in certain novel details of constructionand combination of elements described in the specification and set forthin the appended claims.

In the accompanying drawings Figure l is a sectional elevation of arotor having the laminie mounted directly on a shaft and held inposition by my improved retaining means; Fig. 2 is an enlarged sectionalview of he retaining means shown in Fig. 1; Fig. 3 is a perspective viewof one-half of one of the split retaining rings. Figs. 4: and 5 aresections showing modified forms of my invention.

A core 12, preferably laminated and inherently expansible is mounteddirectly on a shaft 10. The shaft is provided with an abutment 11against which a plate 13 rests. The laminae of the core 12 are heldbetween this plate 13 and another plate 1% by in split ring 15 which ispartially seated in a circumferential groove in the shaft 10. One halfof the preferred form of split retaining Specification of LettersPatent.

Patented Mar. 9, 1915. Serial in). 493,399.

ring is shown in perspective in ig. 8. it comprises two segmentalduplicate interchangeable parts each part of which has two male portions16 and two female portions 17. The male and female portions of one partof the split retaining rings are respectively complementary to thefemale and male portions of the other part. When the two parts havinginterlocking projections are placed in the groove 18 and lockedtogether, they prevent an outward movement of the laminae and plates.Furthermore when this split retaining ring is set in the groove and themale portions of one part engage tie female portions of the other partit is impossible for the action'of centrifugal force to throw the ringout of the groove. The groove 18 in the shaft 10 is made considerablywider than the width of the ring. This is neces sary in order to insertthe two parts of the split ring before the complementary elements are incontact and locked.

in two modifications of my invention illus trated in Figs. 4 and 5, Ihave shown the split rings having inclined faces 19 and :20 engaginggrooves which are also provided with inclined faces. it is furtherevident that my invention may be applied to the stator as well as to therotor.

It is evident that my invention is capable of having a great manymodifications and I aim to cover all of the modifications which do notdepart from the spirit and scope of the invention.

What I claim as new is 1. n combination with a support of approximatelycylindrical cross-section and provided with an annular recess, anelement mounted on said support, and a ring made up of segmental piecesdisposed in said recess and bearing against a side thereof, saidsegmental pieces having interlocking projections and being held togetherby pressure on opposite sides of said ring, and said ring acting toprevent movement of said element axially of said support.

2. in combination with a support, an inherently eXpansible elementmounted on said support, and a ring made up of segmental pieces havinginterlocking projections which extend parallel to the axis of thesupport, said segmental pieces being held in position with theirinterlocking projections in engagement by pressure on oppoplurality sitesides of said ring, and said ring acting to prevent movement of saidcore axially of said support.

3. A device for holding laminations on a cylinder, comprising a ringcomposed of a plurality of similar, interchangeable, segmental members,each having male an emale portions, the male portions of each memberextending parallel to the axis of the ring and in opposite directions.

L. In combination, a shaft, a body mounted thereon and comprising aninherently expansible part, a shoulder on said shaft, and means forholding said body against axial movement comprising a ring composed of apluralit Y of similar sections and engaging said shoulder, each sectionof said ring being provided with interengaging portions to preventradial displacement and being removable from said shaft by axialmovement of one section toward said expansible part.

5. In combination, a shaft, a body mounted thereon and comprising aninherently expansible part, a shoulder on said shaft and means forholding said body against axial movement comprising a ring composed of aof similar,

interchangeable seesection provided with oppositelytions, each Copies ofthis; patent may beiobtained for five cents each,

disposed, axially-extending projections at its ends and engaging saidshoulder, said ring being removable from said shaft by axial movement ofone section toward said expansible part.

6. In a device for holding a body comprising an inherently expansibleelementagainst movement on a support, a ring made up of segmental pieceshaving interlocking projections extending parallel to the axisof saidsupport, said segmental pieces being adapted to be held in position withtheir interlocking projections in engagement by pressure on oppositesides of said ring.

7. A ring comprising a plurality of segmental members each having aplurality of male and female portions, each of said portions coactingwith a complementary portion of another of said members, the maleportions of each member extending axially in opposite directions withrespect to said rm V 1% testimony whereofI afiix my signature, in thepresence of two witnesses.

EARLE R. KNIGHT.

Witnesses THOMPSON, J osnrn F. WEBER.

by addressing the Commissioner of Yatents,

Washington, D. G.

